D4, Octamethylcyclotetrasiloxane 1. CAS No.: 556-67-2 2. Purity: >99% 3. ... -Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasiloxane1. Properties:Chemical Name: Octamethylcyclotetrasiloxane(D4) CAS No.:556-67-2EINECS ... Appearance:Colorless clear oily liquid2. Applications:D4, Octamethylcyclotetrasiloxane, CAS No.: 556-67-2 is a base fluid in a ... Stored in shady, cool and ventilated place. D4 CAS No.: 556-67-2